Blackout will only receed the Dinos but as soon as you turn your lights on the dinos will return. I agree with adding pods, increase No3 and Po4 levels. The biggest thing that worked for me was dosing MicroBacter7 daily until they were gone. I'm not promoting Microbacter 7 but that is the product that I used. The thing about Dinos is they show up in tanks that are not balanced. So if you where carbon dosing, stripping nutrients out of the tank to zero, and possibly added something (coral, fish or LR) that caused an imbalance, that is where Dinos come from. You have to get your system back in balance to defeat the Dinos thus upping nutrients to grow different algae to outcompete the dinos, adding pods, and bacteria. Never ever do water changes while you have dinos, you will only add nutrients that the Dinos need to thrive. I think one need to attack them in more than one way (ie. Pods, Bacteria, manual removal) That means stay on your tank maintenance such as clean filter socks, skim and clean skimmer, get the dinos into the water column, I have also read that a UV sterilizer will kill them as well. I don't know personally but there is alot of positive reviews on it. Adding Pods, and becteria. Those are the things I did and i defeated them. I now add Pods, and dose bacteria every quarter to keep my tank in balance. Another product that works well is Dr. Tim's Waste away and Refresh. Again, its going to take time and patience for it to work. Good luck on your battle with the dreaded Dinos, its not going to be an easy one but it can done.